What do you mean by upgraded? The newest one is the F-200, which includes touch screen. Get that one, since it's just a revision of the F-100, and as long as you're getting a new one (I'm assuming), there's no real point in getting the F-100.
They both have the same CPU power and run the same software. The new one has a touchscreen, a d-pad instead of a stick, and a louder stereo audio amp for louder speakers.